Gintaute Aiste, Weber Karin, Zitzmann Nicola U, Brägger Urs, Ferrari Marco, Joda Tim
Department of Reconstructive Dentistry, University Center for Dental Medicine Basel, University of Basel, 4058 Basel, Switzerland.
Private Dental Office, 4314 Zeiningen, Switzerland.
J Clin Med. 2021 Jun 16;10(12):2661. doi: 10.3390/jcm10122661.
This double-blind randomized controlled trial with a crossover design analyzed the technical and clinical performance of three-unit monolithic ZrO implant-fixed dental prostheses (iFDPs), prepared using two complete digital workflows (Test-1, Test-2) and one mixed analog-digital workflow (Control). Each of the 20 study patients received three iFDPs, resulting in 60 restorations for analysis. The quality of the restorations was assessed by analyzing laboratory cross-mounting and calculating the chairside adjustment time required during fitting. All iFDPs could be produced successfully with all three workflows. The highest cross-mounting success rate was observed for the original pairing iFDP/model of the Control group. Overall, 60% of iFDPs prepared with Test-1 workflow did not require chairside adjustment compared with 50% for Test-2 and 30% for Controls. The mean total chairside adjustment time, as the sum of interproximal, pontic, and occlusal corrections was 2.59 ± 2.51 min (Control), 2.88 ± 2.86 min (Test-1), and 3.87 ± 3.02 min (Test-2). All tested workflows were feasible for treatment with iFDPs in posterior sites on a soft tissue level type implant system. For clinical routine, it has to be considered that chairside adjustments may be necessary, at least in every second patient, independent on the workflow used.
这项采用交叉设计的双盲随机对照试验分析了三件式整体式氧化锆种植体固定义齿（iFDP）的技术和临床性能，这些义齿采用两种完整的数字工作流程（测试1、测试2）和一种混合模拟-数字工作流程（对照）制备。20名研究患者每人接受三件iFDP，共60个修复体用于分析。通过分析实验室交叉安装情况并计算试戴时所需的椅旁调整时间来评估修复体的质量。所有三种工作流程均能成功制作所有iFDP。对照组原始配对的iFDP/模型的交叉安装成功率最高。总体而言，采用测试1工作流程制备的iFDP中，60%不需要椅旁调整，而测试2为50%，对照为30%。作为邻面、桥体和咬合调整总和的平均椅旁总调整时间，对照组为2.59±2.51分钟，测试1为2.88±2.86分钟，测试2为3.87±3.02分钟。在软组织水平型种植体系统的后牙部位，所有测试的工作流程用于iFDP治疗都是可行的。在临床常规操作中，必须考虑到，至少每两名患者中就可能有一名需要椅旁调整，这与所使用的工作流程无关。
